JSON Formatter & Validator
FreePaste or upload your JSON data to instantly format, validate, and beautify it. Our tool detects syntax errors with precise line and column numbers, supports collapsible tree views, and offers customizable indentation. Convert between minified and pretty-printed JSON with a single click. Essential for API development and debugging.
How It Works
Upload or enter your data
Drag and drop your file or paste your content into the tool input area.
Configure options
Adjust settings and preferences to get exactly the output you need.
Get your result
Download your processed file or copy the output. Everything happens in your browser.
Frequently Asked Questions
Yes, our validator detects all syntax errors and pinpoints the exact line and column number. It highlights common issues like missing commas, unquoted keys, and trailing commas.
Yes, toggle between pretty-printed (indented) and minified (compact) JSON with a single click. You can also customize the indentation level (2 or 4 spaces, or tabs).
Yes, our formatter handles JSON files up to 10 MB efficiently. The tree view allows you to expand and collapse nested objects for easy navigation of large datasets.
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